remove patch

Makefile

@@ -2,7 +2,6 @@ export BUILD_VERSION ?= 1.15.0
 export DEBIAN_FRONTEND ?= noninteractive
 export LANG ?= C.UTF-8
 export TZ ?= UTC
-export RUSTFLAGS ?= -C link-arg=-s
 DB ?= postgresql
 SRC := src
 
@@ -20,9 +19,8 @@ build-src:
 .PHONY: build-bin
 build-bin:
 	rustup set profile minimal && \
-	cp patch/main.rs src/src/ && \
 	cd $(SRC) && \
-	rustup target add x86_64-unknown-linux-musl && \
+	RUSTFLAGS="-C link-arg=-s" rustup target add x86_64-unknown-linux-musl && \
 	BWRS_VERSION="$${BUILD_VERSION##v}" cargo build -j 8 --features $(DB) --release
 
 .PHONY: clean