Revert "[Sema] Sanity-check alignment requested via __attribute__((assume_aligned(imm)))"

Likely makes bots angry.

This reverts commit a4cfb15.

# Conflicts:
#	clang/lib/Sema/SemaDeclAttr.cpp

Author: LebedevRI

clang/lib/Sema/SemaDeclAttr.cpp

@@ -1625,10 +1625,6 @@ void Sema::AddAssumeAlignedAttr(Decl *D, const AttributeCommonInfo &CI, Expr *E,
         << E->getSourceRange();
       return;
     }
-
-    if (I > Sema::MaximumAlignment)
-      Diag(CI.getLoc(), diag::warn_assume_aligned_too_great)
-          << CI.getRange() << Sema::MaximumAlignment;
   }
 
   if (OE) {

clang/test/Sema/builtin-assume-aligned.c

@@ -46,7 +46,6 @@ int test8(int *a, int j) {
 void test_void_assume_aligned(void) __attribute__((assume_aligned(32))); // expected-warning {{'assume_aligned' attribute only applies to return values that are pointers}}
 int test_int_assume_aligned(void) __attribute__((assume_aligned(16))); // expected-warning {{'assume_aligned' attribute only applies to return values that are pointers}}
 void *test_ptr_assume_aligned(void) __attribute__((assume_aligned(64))); // no-warning
-void *test_ptr_assume_aligned(void) __attribute__((assume_aligned(1073741824))); // expected-warning {{requested alignment must be 536870912 bytes or smaller; maximum alignment assumed}}
 
 int j __attribute__((assume_aligned(8))); // expected-warning {{'assume_aligned' attribute only applies to Objective-C methods and functions}}
 void *test_no_fn_proto() __attribute__((assume_aligned(32))); // no-warning