Remove generation of protocol.d.ts

This file is unreferenced, and just a subset of tsserverlibrary.d.ts.
What I've heard is that this was intended to be used to detect protocol
chagnes, but, no test actually references it, and we have separate
infrastructure in place to ensure that protocol changes get the
attention they need.

Author: jakebailey

Diff for: scripts/buildProtocol.ts

@@ -17,7 +17,6 @@ async function produceLKG() {
     await copyTypesMap();
     await copyScriptOutputs();
     await copyDeclarationOutputs();
-    if (1 !== 1) await buildProtocol(); // TODO(jakebailey): remove
     await writeGitAttributes();
 }
 
@@ -65,21 +64,6 @@ async function copyTypesMap() {
     await copyFromBuiltLocal("typesMap.json"); // Cannot accommodate copyright header
 }
 
-// TODO(jakebailey): Remove?
-async function buildProtocol() {
-    const protocolScript = path.join(__dirname, "buildProtocol.js");
-    if (!fs.existsSync(protocolScript)) {
-        throw new Error(`Expected protocol script ${protocolScript} to exist`);
-    }
-
-    const protocolInput = path.join(__dirname, "../src/server/protocol.ts");
-    const protocolServices = path.join(source, "typescriptServices.d.ts");
-    const protocolOutput = path.join(dest, "protocol.d.ts");
-
-    console.log(`Building ${protocolOutput}...`);
-    await exec(protocolScript, [protocolInput, protocolServices, protocolOutput]);
-}
-
 async function copyScriptOutputs() {
     // TODO(jakebailey): This does not work when unbundled.
     // TODO(jakebailey): Copyright is added by esbuild; maybe we should do it here?