Fix Ameba Lint/UselessAssign

spec/http_server/handlers/static_assets_handler_spec.cr

@@ -106,8 +106,7 @@ Spectator.describe StaticAssetsHandler do
         file_link = "/#{File.basename(temporary_file.path)}"
 
         # Make request
-        headers = HTTP::Headers{"Range" => "bytes=0-2"}
-        response = handle HTTP::Request.new("GET", file_link, headers)
+        handle HTTP::Request.new("GET", file_link, HTTP::Headers{"Range" => "bytes=0-2"})
 
         # Mutate file on disk
         temporary_file << "Something else"

src/invidious/http_server/static_assets_handler.cr

@@ -71,7 +71,7 @@ module Invidious::HttpServer
 
     # Writes file data to the cache
     private def flush_io_to_cache(io, file_path, file_info)
-      if @@cached_files.sum(&.[1].size) + (size = file_info.size) < CACHE_LIMIT
+      if @@cached_files.sum(&.[1].size) + file_info.size < CACHE_LIMIT
         data_slice = io.to_slice
         @@cached_files[file_path] = CachedFile.new(data_slice, file_info.size, file_info.modification_time)
       end