build: remove --enable-experimental-features / EXPERIMENTAL_FEATURES

Changelog-EXPERIMENTAL: Build: all experimental features are now runtime-enabled; no more ./configure --enable-experimental-features
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

.github/workflows/macos.yaml

@@ -10,7 +10,6 @@ jobs:
     env:
       DEVELOPER: 1
       VALGRIND: 0
-      EXPERIMENTAL_FEATURES: 1
       COMPAT: 0
     strategy:
       fail-fast: true
@@ -42,7 +41,6 @@ jobs:
         env:
           VALGRIND: ${{ matrix.VALGRIND }}
           DEVELOPER: ${{ matrix.DEVELOPER }}
-          EXPERIMENTAL_FEATURES: ${{ matrix.EXPERIMENTAL_FEATURES }}
           COMPILER: ${{ matrix.COMPILER }}
           COMPAT: ${{ matrix.COMPAT }}
           PYTEST_PAR: ${{ matrix.PYTEST_PAR }}