🔥 Remove the pinned npm version; use the node default

We had a pinned npm version, but we didn't actually use it,
using the default version in node instead. As long as we have
a reasonbly recent version of node, that seems like it will work.
It is still pinned (just pinned implicitly by the node pin), and we don't
actually use the pinned version now anyway.

Yay for simplicity and not keeping bitrotted code around...

setup/activate_shared.sh

@@ -7,6 +7,3 @@ echo "Activating nvm"
 
 echo "Using version $NODE_VERSION"
 nvm use $NODE_VERSION
-
-CURR_NPM_VERSION=`npm --version`
-echo "npm version = $CURR_NPM_VERSION"

setup/export_shared_dep_versions.sh

@@ -1,6 +1,5 @@
 export NVM_VERSION=0.40.0
 export NODE_VERSION=20.9.0
-export NPM_VERSION=10.8.2
 # make sure that this is a stable version from
 # so that https://github.com/postmodern/ruby-versions
 # ideally, this would be the same version as the CI

setup/setup_shared.sh

@@ -12,11 +12,3 @@ echo "Setting up the variables to run nvm"
 
 echo "Installing the correct node version"
 nvm install $NODE_VERSION
-
-echo "Check the version of npm"
-CURR_NPM_VERSION=`npm --version`
-if [ $CURR_NPM_VERSION != $NPM_VERSION ];
-then
-    echo "Invalid npm version, expected $NPM_VERSION, got $CURR_NPM_VERSION"
-    npm install npm@$NPM_VERSION
-fi