fix: remove unused variables

Signed-off-by: Andrew Calcutt <acalcutt@techidiots.net>

src/pmtiles_adapter.js

@@ -140,7 +140,6 @@ const ReadBytes = async (filePath, offset, size) => {
   const stats = fs.statSync(filePath); // file details
   const fd = fs.openSync(filePath); // file descriptor
   let bytesRead = 0; // how many bytes were read
-  let end = size;
 
   for (let i = 0; i < size; i++) {
     let postion = offset + i;

src/serve_rendered.js

@@ -1251,7 +1251,6 @@ export const serve_rendered = {
               const sourceId = parts[2];
               const source = map.sources[sourceId];
               const sourceInfo = styleJSON.sources[sourceId];
-              var typeofv = typeof map.sources[sourceId]
 
               const z = parts[3] | 0;
               const x = parts[4] | 0;