cmd/compile: remove commented-out old c code

Change-Id: I9b2e6c45f7e83543a06d0aafd08a911f7b6485fd
Reviewed-on: https://go-review.googlesource.com/29874Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/compile/internal/gc/init.go

@@ -4,19 +4,6 @@
 
 package gc
 
-//	case OADD:
-//		if(n->right->op == OLITERAL) {
-//			v = n->right->vconst;
-//			naddr(n->left, a, canemitcode);
-//		} else
-//		if(n->left->op == OLITERAL) {
-//			v = n->left->vconst;
-//			naddr(n->right, a, canemitcode);
-//		} else
-//			goto bad;
-//		a->offset += v;
-//		break;
-
 // a function named init is a special case.
 // it is called by the initialization before
 // main is run. to make it unique within a