[llvm][test] Don't specify target for tests in Generic directory

Fixes buildbot failures where no arm64 target was available.

Author: Michael137

llvm/test/DebugInfo/Generic/compileunit-source-language-name.ll

@@ -2,9 +2,6 @@
 
 ; CHECK: DW_AT_language_name (DW_LNAME_ObjC_plus_plus)
 
-source_filename = "cu.cpp"
-target triple = "arm64-apple-macosx"
-
 @x = global i32 0, align 4, !dbg !0
 
 !llvm.dbg.cu = !{!2}

llvm/test/DebugInfo/Generic/compileunit-source-language.ll

@@ -2,9 +2,6 @@
 
 ; CHECK: DW_AT_language (DW_LANG_C)
 
-source_filename = "cu.cpp"
-target triple = "arm64-apple-macosx"
-
 @x = global i32 0, align 4, !dbg !0
 
 !llvm.dbg.cu = !{!2}