remove references to showTestconverageReport and toggleTestCoverage commands (#829)

Author: matthewbastien

package.json

@@ -537,14 +537,6 @@
           "command": "swift.restartLSPServer",
           "when": "swift.isActivated"
         },
-        {
-          "command": "swift.showTestCoverageReport",
-          "when": "swift.isActivated"
-        },
-        {
-          "command": "swift.toggleTestCoverage",
-          "when": "swift.isActivated"
-        },
         {
           "command": "swift.openPackage",
           "when": "swift.hasPackage"