update GitHub actions

.github/FUNDING.yml

@@ -2,4 +2,3 @@
 
 github: RobTillaart
 custom: "https://www.paypal.me/robtillaart"
-

.github/workflows/arduino-lint.yml

@@ -1,4 +1,3 @@
-
 name: Arduino-lint
 
 on: [push, pull_request]

.github/workflows/arduino_test_runner.yml

@@ -1,4 +1,3 @@
----
 name: Arduino CI
 
 on: [push, pull_request]
@@ -14,6 +13,5 @@ jobs:
         with:
           ruby-version: 2.6
       - run: |
-          sudo sysctl vm.mmap_rnd_bits=28
           gem install arduino_ci
           arduino_ci.rb

.github/workflows/jsoncheck.yml

@@ -16,4 +16,3 @@ jobs:
         uses: limitusus/json-syntax-check@v2
         with:
           pattern: "\\.json$"
-