CI: Remove build job for MSYS clang32

Upstream dropped support for clang32, and our CI build already
fails on it, so remove the build job.

msys2/setup-msys2#458

Closes #1607

Signed-off-by: Jesse Taube <[email protected]>

Author: Mr-Bossman

.github/workflows/msys2_clang32.yml

@@ -1 +1 @@
-#define LIBUSB_NANO 11941
+#define LIBUSB_NANO 11942