[bazel] Remove IR dependency from Support after llvm#145598

Author: itf

utils/bazel/llvm-project-overlay/mlir/BUILD.bazel

@@ -4845,10 +4845,7 @@ cc_library(
     ]),
     hdrs = glob(["include/mlir/Support/*.h"]),
     includes = ["include"],
-    deps = [
-        "//llvm:Support",
-        "//mlir:IR",
-    ],
+    deps = ["//llvm:Support"],
 )
 
 cc_library(