Remove register everything.

This should just be IR one.

PiperOrigin-RevId: 820548236

Author: jpienaar

stablehlo/stablehlo/integrations/c/VhloDialect.h

@@ -13,7 +13,7 @@ limitations under the License.
 #ifndef STABLEHLO_INTEGRATIONS_C_VHLO_DIALECT_H
 #define STABLEHLO_INTEGRATIONS_C_VHLO_DIALECT_H
 
-#include "mlir-c/RegisterEverything.h"
+#include "mlir-c/IR.h"
 
 #ifdef __cplusplus
 extern "C" {