drm/i915/gt: Drop the duplicate icl workaround

The extra w/a was revived in the backmerge that was meant to fix it!

Fixes: 88c90e80 ("Merge drm/drm-next into drm-intel-next-queued")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190710200428.3275-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/gt/intel_workarounds.c

@@ -531,12 +531,6 @@ static void icl_ctx_workarounds_init(struct intel_engine_cs *engine,
 {
 	struct drm_i915_private *i915 = engine->i915;
 
-	/* WaDisableBankHangMode:icl */
-	wa_write(wal,
-		 GEN8_L3CNTLREG,
-		 intel_uncore_read(engine->uncore, GEN8_L3CNTLREG) |
-		 GEN8_ERRDETBCTRL);
-
 	/* WaDisableBankHangMode:icl */
 	wa_write(wal,
 		 GEN8_L3CNTLREG,