Revert "docs: add Alpine Linux build instructions"

This reverts commit 87feac8.

Author: Mohammed Ehab

README.md

@@ -50,29 +50,6 @@ RUN pip install \
         awslambdaric
 ```
 
-The `apt-get` snippet above is for Debian/Ubuntu. On **Alpine Linux** the prebuilt
-`manylinux2014` wheels are not compatible (Alpine uses musl libc and no `musllinux`
-wheels are published), so the client is always built from source. Alpine's base
-images are minimal, so you must install the full build toolchain via `apk`. Note
-that `libexecinfo-dev` is **not** required (it was removed in Alpine 3.17+); the
-client builds without it:
-
-```dockerfile
-# Install aws-lambda-cpp build dependencies (Alpine Linux)
-RUN apk add --no-cache \
-  build-base \
-  libtool \
-  autoconf \
-  automake \
-  cmake \
-  curl
-
-# Install the function's dependencies
-RUN pip install \
-    --target ${FUNCTION_DIR} \
-        awslambdaric
-```
-
 The next step would be to set the `ENTRYPOINT` property of the Docker image to invoke the Runtime Interface Client and then set the `CMD` argument to specify the desired handler.
 
 Example Dockerfile (to keep the image light we use a multi-stage build):