add make uninstall

Author: rohitpaulk

Makefile

@@ -5,6 +5,9 @@ next_version_number := $(shell echo $$(($(current_version_number)+1)))
 install:
 	go build -o $$GOPATH/bin/codecrafters cmd/codecrafters/main.go
 
+uninstall:
+	rm $$GOPATH/bin/codecrafters
+
 install_latest_from_github:
 	curl -Lo $$GOPATH/bin/codecrafters https://github.com/codecrafters-io/cli/releases/download/v$(current_version_number)/v$(current_version_number)_darwin_arm64