Remove the Identifier::is() method, it is now equivalent to operator==. NFC.

Summary: Depends on D78042.

Reviewers: rriddle!

Subscribers: mehdi_amini, rriddle, jpienaar, burmako, shauheen, antiagainst, nicolasvasilache, arpith-jacob, mgester, lucyrfox, liufengdb, Joonsoo, grosul1, frgossen, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D78043

Author: lattner

mlir/include/mlir/IR/Identifier.h

@@ -51,9 +51,6 @@ class Identifier {
   /// Return the number of bytes in this string.
   unsigned size() const { return entry->getKeyLength(); }
 
-  /// Return true if this identifier is the specified string.
-  bool is(StringRef string) const { return strref() == string; }
-
   const char *begin() const { return data(); }
   const char *end() const { return entry->getKeyData() + size(); }