Remove handling of obsolete Android versions whose temporary directory is /sdcard.

This handling was added in feb83a1. It became unnecessary once [our minSdkVersion hit 16](#4011 (comment)), as it did years ago.

(I was reminded of this while reviewing #7986 for #5756.)

RELNOTES=n/a
PiperOrigin-RevId: 811449148

Author: cpovirk

android/guava-tests/test/com/google/common/io/FileBackedOutputStreamTest.java

@@ -16,7 +16,6 @@
 
 package com.google.common.io;
 
-import static com.google.common.base.StandardSystemProperty.JAVA_IO_TMPDIR;
 import static com.google.common.base.StandardSystemProperty.OS_NAME;
 import static com.google.common.truth.Truth.assertThat;
 import static java.lang.Math.min;
@@ -73,10 +72,6 @@ private void testThreshold(
 
     // Write data to go over the threshold
     if (chunk2 > 0) {
-      if (JAVA_IO_TMPDIR.value().equals("/sdcard")) {
-        assertThrows(IOException.class, () -> write(out, data, chunk1, chunk2, singleByte));
-        return;
-      }
       write(out, data, chunk1, chunk2, singleByte);
       file = out.getFile();
       assertEquals(dataSize, file.length());
@@ -132,10 +127,6 @@ public void testWriteErrorAfterClose() throws Exception {
     FileBackedOutputStream out = new FileBackedOutputStream(50);
     ByteSource source = out.asByteSource();
 
-    if (JAVA_IO_TMPDIR.value().equals("/sdcard")) {
-      assertThrows(IOException.class, () -> out.write(data));
-      return;
-    }
     out.write(data);
     assertTrue(Arrays.equals(data, source.read()));
 

android/guava-tests/test/com/google/common/io/FilesCreateTempDirTest.java

@@ -16,14 +16,12 @@
 
 package com.google.common.io;
 
-import static com.google.common.base.StandardSystemProperty.JAVA_IO_TMPDIR;
 import static com.google.common.base.StandardSystemProperty.JAVA_SPECIFICATION_VERSION;
 import static com.google.common.base.StandardSystemProperty.OS_NAME;
 import static com.google.common.truth.Truth.assertThat;
 import static java.nio.file.attribute.PosixFilePermission.OWNER_EXECUTE;
 import static java.nio.file.attribute.PosixFilePermission.OWNER_READ;
 import static java.nio.file.attribute.PosixFilePermission.OWNER_WRITE;
-import static org.junit.Assert.assertThrows;
 
 import java.io.File;
 import java.io.IOException;
@@ -42,10 +40,6 @@
 @NullUnmarked
 public class FilesCreateTempDirTest extends TestCase {
   public void testCreateTempDir() throws IOException {
-    if (JAVA_IO_TMPDIR.value().equals("/sdcard")) {
-      assertThrows(IllegalStateException.class, Files::createTempDir);
-      return;
-    }
     File temp = Files.createTempDir();
     try {
       assertThat(temp.exists()).isTrue();

guava-tests/test/com/google/common/io/FileBackedOutputStreamTest.java

@@ -16,7 +16,6 @@
 
 package com.google.common.io;
 
-import static com.google.common.base.StandardSystemProperty.JAVA_IO_TMPDIR;
 import static com.google.common.base.StandardSystemProperty.OS_NAME;
 import static com.google.common.truth.Truth.assertThat;
 import static java.lang.Math.min;
@@ -73,10 +72,6 @@ private void testThreshold(
 
     // Write data to go over the threshold
     if (chunk2 > 0) {
-      if (JAVA_IO_TMPDIR.value().equals("/sdcard")) {
-        assertThrows(IOException.class, () -> write(out, data, chunk1, chunk2, singleByte));
-        return;
-      }
       write(out, data, chunk1, chunk2, singleByte);
       file = out.getFile();
       assertEquals(dataSize, file.length());
@@ -132,10 +127,6 @@ public void testWriteErrorAfterClose() throws Exception {
     FileBackedOutputStream out = new FileBackedOutputStream(50);
     ByteSource source = out.asByteSource();
 
-    if (JAVA_IO_TMPDIR.value().equals("/sdcard")) {
-      assertThrows(IOException.class, () -> out.write(data));
-      return;
-    }
     out.write(data);
     assertTrue(Arrays.equals(data, source.read()));
 

guava-tests/test/com/google/common/io/FilesCreateTempDirTest.java

@@ -16,14 +16,12 @@
 
 package com.google.common.io;
 
-import static com.google.common.base.StandardSystemProperty.JAVA_IO_TMPDIR;
 import static com.google.common.base.StandardSystemProperty.JAVA_SPECIFICATION_VERSION;
 import static com.google.common.base.StandardSystemProperty.OS_NAME;
 import static com.google.common.truth.Truth.assertThat;
 import static java.nio.file.attribute.PosixFilePermission.OWNER_EXECUTE;
 import static java.nio.file.attribute.PosixFilePermission.OWNER_READ;
 import static java.nio.file.attribute.PosixFilePermission.OWNER_WRITE;
-import static org.junit.Assert.assertThrows;
 
 import java.io.File;
 import java.io.IOException;
@@ -42,10 +40,6 @@
 @NullUnmarked
 public class FilesCreateTempDirTest extends TestCase {
   public void testCreateTempDir() throws IOException {
-    if (JAVA_IO_TMPDIR.value().equals("/sdcard")) {
-      assertThrows(IllegalStateException.class, Files::createTempDir);
-      return;
-    }
     File temp = Files.createTempDir();
     try {
       assertThat(temp.exists()).isTrue();