Removing unused il test args

Replacing arg string with empty string

Author: BrianBohe

src/tests/JIT/Directed/coverage/oldtests/switchdefaultonly1.il

@@ -12,7 +12,7 @@
 .class private auto ansi beforefieldinit switchdefaultonly1
        extends [mscorlib]System.Object
 {
-  .method private hidebysig static int32 Main(string[] args) cil managed
+  .method private hidebysig static int32 Main() cil managed
   {
     .custom instance void [xunit.core]Xunit.FactAttribute::.ctor() = (
         01 00 00 00
@@ -21,16 +21,18 @@
     // Code size       49 (0x31)
     .maxstack  2
     .locals init (int32 V_0)
-    IL_0000:  ldarg.0
+              ldc.i4.s 0
+    IL_0000:  newarr [mscorlib]System.String
     IL_0001:  ldlen
     IL_0002:  conv.i4
     IL_0003:  stloc.0
     IL_0004:  ldloc.0
     IL_0005:  ldc.i4.1
     IL_0006:  sub
     IL_0007:  switch     (IL_0014)
-    IL_0014:  br.s       IL_0026
-    IL_0026:  ldarg.0
+    IL_0014:  br.s       IL_0025
+    IL_0025:  ldc.i4.s 0
+    IL_0026:  newarr [mscorlib]System.String
     IL_0027:  ldlen
     IL_0028:  conv.i4
     IL_0029:  call       void [System.Console]System.Console::WriteLine(int32)

src/tests/JIT/Directed/coverage/oldtests/switchdefaultonly2.il

@@ -12,7 +12,7 @@
 .class private auto ansi beforefieldinit switchdefaultonly1
        extends [mscorlib]System.Object
 {
-  .method private hidebysig static int32  Main(string[] args) cil managed
+  .method private hidebysig static int32  Main() cil managed
   {
     .custom instance void [xunit.core]Xunit.FactAttribute::.ctor() = (
         01 00 00 00
@@ -21,23 +21,24 @@
     // Code size       49 (0x31)
     .maxstack  2
     .locals init (int32 V_0)
-    IL_0000:  ldarg.0
+              ldc.i4.s 0
+    IL_0000:  newarr [mscorlib]System.String
     IL_0001:  ldlen
     IL_0002:  conv.i4
     IL_0003:  stloc.0
     IL_0004:  ldloc.0
     IL_0005:  ldc.i4.1
     IL_0006:  sub
     IL_0007:  switch     (IL_0014)
-    IL_0014:  br.s       IL_0026
+    IL_0014:  br.s       IL_0025
 
     IL_001c:  br.s       IL_0030
 
     IL_001e:  ldc.i4.2
     IL_001f:  call       void [System.Console]System.Console::WriteLine(int32)
     IL_0024:  br.s       IL_0030
-
-    IL_0026:  ldarg.0
+    IL_0025:  ldc.i4.s 0
+    IL_0026:  newarr [mscorlib]System.String
     IL_0027:  ldlen
     IL_0028:  conv.i4
     IL_0029:  call       void [System.Console]System.Console::WriteLine(int32)

src/tests/JIT/Directed/coverage/oldtests/switchdefaultonly3.il

@@ -12,7 +12,7 @@
 .class private auto ansi beforefieldinit switchdefaultonly1
        extends [mscorlib]System.Object
 {
-  .method private hidebysig static int32  Main(string[] args) cil managed
+  .method private hidebysig static int32  Main() cil managed
   {
     .custom instance void [xunit.core]Xunit.FactAttribute::.ctor() = (
         01 00 00 00
@@ -21,7 +21,8 @@
     // Code size       49 (0x31)
     .maxstack  2
     .locals init (int32 V_0)
-    IL_0000:  ldarg.0
+              ldc.i4.s 0
+    IL_0000:  newarr [mscorlib]System.String
     IL_0001:  ldlen
     IL_0002:  conv.i4
     IL_0003:  stloc.0
@@ -32,7 +33,8 @@
     IL_0014:  br.s       IL_0026
     IL_0026:  .try
     {
-      ldarg.0
+      ldc.i4.s 0
+      newarr [mscorlib]System.String
       ldlen
       conv.i4
       call       void [System.Console]System.Console::WriteLine(int32)