Remove all references to DEVELOPER env var

.github/workflows/main.yml

@@ -12,14 +12,13 @@ on:
 
 jobs:
   build-and-test:
-    name: Test PY=${{ matrix.python-version }}, DEV=${{ matrix.developer }}, EXP=${{ matrix.experimental }}, DEP=${{ matrix.deprecated }}
+    name: Test PY=${{ matrix.python-version }}, EXP=${{ matrix.experimental }}, DEP=${{ matrix.deprecated }}
     runs-on: ubuntu-latest
     timeout-minutes: 60
     strategy:
       fail-fast: false
       matrix:
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
-        developer: [0,1]
         experimental: [1]
         deprecated: [0]
 
@@ -46,7 +45,6 @@ jobs:
     - name: Compile & install c-lightning@master
       run: |
         export EXPERIMENTAL_FEATURES=${{ matrix.experimental }}
-        export DEVELOPER=${{ matrix.developer }}
         export COMPAT=${{ matrix.deprecated }}
         export VALGRIND=0
         sudo apt-get install -y \
@@ -89,7 +87,6 @@ jobs:
     - name: Test with pytest
       run: |
         export EXPERIMENTAL_FEATURES=${{ matrix.experimental }}
-        export DEVELOPER=${{ matrix.developer }}
         export COMPAT=${{ matrix.deprecated }}
         export SLOW_MACHINE=1
         export TEST_DEBUG=1