[llvm] [GlobalISel][NFC]Delete the comments of XXLegalizerInfo (PR #76918)

[Ningning Shi 史宁宁 via llvm-commits]

================
@@ -23,7 +23,8 @@ namespace llvm {
 
 class ARMSubtarget;
 
-/// This class provides the information for the target register banks.
+/// This class provides the information for the ARM target legalizer for
----------------
shining1984 wrote:

I delete them.

https://github.com/llvm/llvm-project/pull/76918