build: fix compilation error with latest MDC canary (#20208)

Fixes an error introduced by the latest MDC canary version.

(cherry picked from commit a8ab040)

Author: crisbeto

package.json

@@ -59,7 +59,7 @@
     "@types/youtube": "^0.0.38",
     "@webcomponents/custom-elements": "^1.1.0",
     "core-js": "^2.6.9",
-    "material-components-web": "8.0.0-canary.abcdbcfeb.0",
+    "material-components-web": "8.0.0-canary.08ca4d0ec.0",
     "rxjs": "^6.5.3",
     "rxjs-tslint-rules": "^4.33.1",
     "systemjs": "0.19.43",

src/material-experimental/mdc-slider/slider.ts

@@ -240,6 +240,7 @@ export class MatSlider implements AfterViewInit, OnChanges, OnDestroy, ControlVa
     getBoundingClientRect: () => null!,
     isRTL: () => false,
     setThumbStyleProperty: (_propertyName: string, _value: string, _thumb: Thumb) => {},
+    removeThumbStyleProperty: (_propertyName: string, _thumb: Thumb) => {},
     setTrackActiveStyleProperty: (_propertyName: string, _value: string) => {},
     setValueIndicatorText: (_value: number, _thumb: Thumb) => {},
     updateTickMarks: () => {},