internal/rosa/cmake: remove variant

This has no effect outside formatting of name and is a remnant of the old llvm helpers.

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/mbf/main.go

@@ -402,20 +402,20 @@ func main() {
 				)
 
 				if pathname, _, err = cache.Cure(
-					(t - 2).Load(rosa.LLVMClang),
+					(t - 2).Load(rosa.Clang),
 				); err != nil {
 					return err
 				}
 				log.Println("stage1:", pathname)
 
 				if pathname, checksum[0], err = cache.Cure(
-					(t - 1).Load(rosa.LLVMClang),
+					(t - 1).Load(rosa.Clang),
 				); err != nil {
 					return err
 				}
 				log.Println("stage2:", pathname)
 				if pathname, checksum[1], err = cache.Cure(
-					t.Load(rosa.LLVMClang),
+					t.Load(rosa.Clang),
 				); err != nil {
 					return err
 				}
@@ -577,7 +577,7 @@ func main() {
 					presets[i] = p
 				}
 
-				base := rosa.LLVMClang
+				base := rosa.Clang
 				if !flagWithToolchain {
 					base = rosa.Musl
 				}