Remove excess binaries in bot image

Dockerfile

@@ -18,35 +18,10 @@ ENV GOARCH=$TARGETARCH
 RUN --mount=type=cache,target=/go/pkg/mod --mount=type=cache,target=/root/.cache/go-build \
  go build -o /dev-ops-bot -ldflags="-s -w -X github.com/traPtitech/DevOpsBot/pkg/utils.version=$VERSION" .
 
-FROM --platform=$BUILDPLATFORM golang:1-alpine AS installer
-
-ENV CGO_ENABLED 0
-ARG TARGETOS
-ARG TARGETARCH
-ENV GOOS=$TARGETOS
-ENV GOARCH=$TARGETARCH
-
-RUN apk add --no-cache wget
-
-RUN wget https:/mikefarah/yq/releases/latest/download/yq_"$TARGETOS"_"$TARGETARCH" -O /yq && \
- chmod +x /yq
-
-RUN --mount=type=cache,target=/go/pkg/mod --mount=type=cache,target=/root/.cache/go-build \
- go install sigs.k8s.io/kustomize/kustomize/v5@latest
-# keep output directory the same between platforms; workaround for https:/golang/go/issues/57485
-RUN cp /go/bin/kustomize /kustomize || cp /go/bin/"$GOOS"_"$GOARCH"/kustomize /kustomize
-
 FROM alpine:3
 
 WORKDIR /work
 
-# Install commands for deploy scripts
-RUN apk add --no-cache git openssh curl npm
-RUN mkdir -p /root/.ssh && ssh-keyscan github.com >> /root/.ssh/known_hosts
-
-COPY --from=installer /yq /usr/local/bin/
-COPY --from=installer /kustomize /usr/local/bin/
-
 COPY --from=builder /dev-ops-bot ./
 
 ENTRYPOINT ["/work/dev-ops-bot"]