tint: remove duplicated ending newline in ctor_conv_intrinsic.cc

This patch remove the duplicated ending newline in ctor_conv_intrinsic
to make cl presubmit upload check happy.

Change-Id: Iec9f415416407696ad210243d011e53dcf28b554
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/94662
Commit-Queue: Zhaoming Jiang <zhaoming.jiang@intel.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>

src/tint/resolver/ctor_conv_intrinsic.cc

@@ -67,4 +67,3 @@ const char* str(CtorConvIntrinsic i) {
 }
 
 }  // namespace tint::resolver
-

src/tint/resolver/ctor_conv_intrinsic.cc.tmpl

@@ -25,4 +25,3 @@ const char* str(CtorConvIntrinsic i) {
 }
 
 }  // namespace tint::resolver
-