Update tools/docker/Dockerfile

Author: lucasssvaz

tools/docker/Dockerfile

@@ -51,7 +51,6 @@ RUN dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')" \
 #   LIBBUILDER_CHECKOUT_REF=<some commit on release/vX.Y branch>.
 # Use LIBBUILDER_CLONE_SHALLOW=1 to peform shallow clone (i.e. --depth=1 --shallow-submodules)
 # Use LIBBUILDER_CLONE_SHALLOW_DEPTH=X to define the depth if LIBBUILDER_CLONE_SHALLOW is used (i.e. --depth=X)
-# Use IDF_INSTALL_TARGETS to install tools only for selected chip targets (CSV)
 
 ARG LIBBUILDER_CLONE_URL=https://github.com/espressif/esp32-arduino-lib-builder
 ARG LIBBUILDER_CLONE_BRANCH_OR_TAG=master