Removes README note from pre-releases

Since pre-releases feed the marketplace content

README.pre.md

@@ -1 +0,0 @@
-> **This is the pre-release edition of GitLens for early feedback, and testing. It works best with [VS Code Insiders](https://code.visualstudio.com/insiders).**

scripts/applyInsidersPatch.js

@@ -3,8 +3,10 @@ const fs = require('fs');
 
 // Patch README
 const insert = fs.readFileSync('./README.insiders.md', { encoding: 'utf8' });
-const data = fs.readFileSync('./README.md', { encoding: 'utf8' });
-fs.writeFileSync('./README.md', `${insert}\n${data}`);
+if (insert.trim().length !== 0) {
+	const data = fs.readFileSync('./README.md', { encoding: 'utf8' });
+	fs.writeFileSync('./README.md', `${insert}\n${data}`);
+}
 
 // Patch package.json
 const date = new Date(new Date().toLocaleString('en-US', { timeZone: 'America/New_York' }));

scripts/applyPreReleasePatch.js

@@ -3,8 +3,10 @@ const fs = require('fs');
 
 // Patch README
 const insert = fs.readFileSync('./README.pre.md', { encoding: 'utf8' });
-const data = fs.readFileSync('./README.md', { encoding: 'utf8' });
-fs.writeFileSync('./README.md', `${insert}\n${data}`);
+if (insert.trim().length !== 0) {
+	const data = fs.readFileSync('./README.md', { encoding: 'utf8' });
+	fs.writeFileSync('./README.md', `${insert}\n${data}`);
+}
 
 // Patch package.json
 const date = new Date(new Date().toLocaleString('en-US', { timeZone: 'America/New_York' }));