Remove espup and ldproxy

Both are available via Nix now.

Containerfile

@@ -6,18 +6,3 @@ RUN apt-get update && \
       libxml2 \
       python3.10 \
       python3.10-venv
-
-RUN apt-get install --yes \
-      curl \
-      unzip && \
-    curl -L 'https://github.com/esp-rs/espup/releases/latest/download/espup-x86_64-unknown-linux-gnu' -o /usr/bin/espup && \
-    chmod a+x /usr/bin/espup && \
-    curl -L 'https://github.com/esp-rs/embuild/releases/download/ldproxy-v0.3.2/ldproxy-x86_64-unknown-linux-gnu.zip' -o ldproxy.zip && \
-    unzip ldproxy.zip ldproxy && \
-    rm ldproxy.zip && \
-    chmod a+x ldproxy && \
-    mv ldproxy /usr/bin/ldproxy && \
-    apt-get remove --yes \
-      curl \
-      unzip && \
-    apt-get autoremove --yes

README.md

@@ -2,11 +2,9 @@
 
 Container images containing [esp-rs](https://github.com/esp-rs) related tooling, intended for use with [Distrobox](https://github.com/89luca89/distrobox).
 
-Created as a result of much annoyance trying to get the ESP-IDF to build in Nix and (to a much lesser extent) the fact that some tools were not yet packaged.
+Created as a result of much annoyance trying to get the ESP-IDF to build in Nix.
 Only the items that could not be managed via Nix are included.
 
 Included is:
   - clang
   - Python + venv (ESP-IDF's "is this a venv" check fails as it does not seem to like Nix directory prefixes)
-  - [espup](https://github.com/esp-rs/espup) (not packaged for Nix)
-  - [ldproxy](https://github.com/esp-rs/embuild/tree/master/ldproxy) (not packaged for Nix)