shims.d.ts should never be included in simulator

sim/state/misc.ts

@@ -186,7 +186,7 @@ namespace pxsim.bluetooth {
         // TODO
     }
     export function advertiseUrl(url: string, power: number, connectable: boolean) { }
-    export function advertiseUidBuffer(nsAndInstance: Buffer, power: number, connectable: boolean) { }
+    export function advertiseUidBuffer(nsAndInstance: RefBuffer, power: number, connectable: boolean) { }
     export function stopAdvertising() { }
     export function setTransmitPower(power: number) {}
 }

sim/state/neopixel.ts

@@ -1,11 +1,11 @@
 namespace pxsim {
-    export function sendBufferAsm(buffer: Buffer, pin: DigitalPin) {
+    export function sendBufferAsm(buffer: RefBuffer, pin: DigitalPin) {
         let b = board();
         if (b) {
             let np = b.neopixelState;
             if (np) {
-                let buf = <Uint8Array[]>(<any>buffer).data;                
-                np.updateBuffer(buf, pin);
+                let buf = buffer.data;
+                np.updateBuffer(buf as any, pin); // TODO this is wrong
                 runtime.queueDisplayUpdate();
             }
         }

sim/visuals/neopixel.ts

@@ -1,6 +1,5 @@
 /// <reference path="../../node_modules/pxt-core/built/pxtsim.d.ts"/>
 /// <reference path="../../libs/core/dal.d.ts"/>
-/// <reference path="../../libs/core/shims.d.ts"/>
 /// <reference path="../../libs/core/enums.d.ts"/>
 
 namespace pxsim.visuals {
@@ -240,4 +239,4 @@ namespace pxsim.visuals {
         }
         public updateTheme(): void { }
     }
-}
+}