Eliminate references to defunct LSHost in comments

src/compiler/moduleNameResolver.ts

@@ -1487,8 +1487,8 @@ namespace ts {
     }
 
     /**
-     * LSHost may load a module from a global cache of typings.
-     * This is the minumum code needed to expose that functionality; the rest is in LSHost.
+     * A host may load a module from a global cache of typings.
+     * This is the minumum code needed to expose that functionality; the rest is in the host.
      */
     /* @internal */
     export function loadModuleFromGlobalCache(moduleName: string, projectName: string | undefined, compilerOptions: CompilerOptions, host: ModuleResolutionHost, globalCache: string): ResolvedModuleWithFailedLookupLocations {

src/server/project.ts

@@ -952,7 +952,7 @@ namespace ts.server {
             this.externalFiles = this.getExternalFiles();
             enumerateInsertsAndDeletes<string, string>(this.externalFiles, oldExternalFiles, getStringComparer(!this.useCaseSensitiveFileNames()),
                 // Ensure a ScriptInfo is created for new external files. This is performed indirectly
-                // by the LSHost for files in the program when the program is retrieved above but
+                // by the host for files in the program when the program is retrieved above but
                 // the program doesn't contain external files so this must be done explicitly.
                 inserted => {
                     const scriptInfo = this.projectService.getOrCreateScriptInfoNotOpenedByClient(inserted, this.currentDirectory, this.directoryStructureHost)!;

src/testRunner/unittests/tscWatch/resolutionCache.ts

@@ -54,7 +54,7 @@ namespace ts.tscWatch {
                 root.content = `import {x} from "f2"`;
                 host.reloadFS(files);
 
-                // trigger synchronization to make sure that LSHost will try to find 'f2' module on disk
+                // trigger synchronization to make sure that system will try to find 'f2' module on disk
                 host.runQueuedTimeoutCallbacks();
 
                 // ensure file has correct number of errors after edit

src/testRunner/unittests/tsserver/cachingFileSystemInformation.ts

@@ -131,10 +131,10 @@ namespace ts.projectSystem {
             verifyImportedDiagnostics();
             callsTrackingHost.verifyNoHostCalls();
 
-            // trigger synchronization to make sure that LSHost will try to find 'f2' module on disk
+            // trigger synchronization to make sure that the host will try to find 'f2' module on disk
             editContent(`import {x} from "f2"`);
             try {
-                // trigger synchronization to make sure that LSHost will try to find 'f2' module on disk
+                // trigger synchronization to make sure that the host will try to find 'f2' module on disk
                 verifyImportedDiagnostics();
                 assert.isTrue(false, `should not find file '${imported.path}'`);
             }

src/testRunner/unittests/tsserver/resolutionCache.ts

@@ -5,7 +5,7 @@ namespace ts.projectSystem {
         return resolutionTrace;
     }
 
-    describe("unittests:: tsserver:: resolutionCache:: tsserverProjectSystem extra resolution pass in lshost", () => {
+    describe("unittests:: tsserver:: resolutionCache:: tsserverProjectSystem extra resolution pass in server host", () => {
         it("can load typings that are proper modules", () => {
             const file1 = {
                 path: "/a/b/app.js",