Revert "[mlir] Add res() method to linalg::ContractionOpInterface (#76539)"

This reverts commit 53edf12.

Reason: Broke the sanitizer buildbots with a memory leak. More
information available on
53edf12

Author: hctim

mlir/include/mlir/Dialect/Linalg/IR/LinalgInterfaces.td

@@ -54,14 +54,6 @@ def LinalgContractionOpInterface : OpInterface<"ContractionOpInterface"> {
       return $_op.getOperation()->getOperand(1);
     }]>,
     InterfaceMethod<
-    /*desc=*/"Returns the result value.",
-    /*retTy=*/"OpResult",
-    /*methodName=*/"res",
-    /*args=*/(ins),
-    /*methodBody=*/[{
-      return $_op.getOperation()->getResult(0);
-    }]>,
-    InterfaceMethod<
     /*desc=*/[{
       Returns whether the given op has indexing maps that correspond to a
       row-major matmul operation.

mlir/unittests/Dialect/CMakeLists.txt

@@ -8,7 +8,6 @@ target_link_libraries(MLIRDialectTests
 
 add_subdirectory(ArmSME)
 add_subdirectory(Index)
-add_subdirectory(Linalg)
 add_subdirectory(LLVMIR)
 add_subdirectory(MemRef)
 add_subdirectory(SCF)