remove a test case that causes compiler warning.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60282 91177308-0d34-0410-b5e6-96231b3b80d8

test/Analysis/array-struct.c

@@ -82,6 +82,5 @@ void f9() {
 // Initializing array with string literal.
 void f10() {
   char a1[4] = "abc";
-  char a2[2] = "abc";
   char a3[6] = "abc";
 }