Remove patching [ci skip]

.github/workflows/build.yml

@@ -39,11 +39,6 @@ jobs:
           wget -q https://developer.arm.com/-/media/Files/downloads/gnu-a/10.3-2021.07/binrel/gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf.tar.xz
           tar xf gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf.tar.xz
 
-      # Patch Synth_Dexed until the fix is merged upstream; see https://github.com/probonopd/MiniDexed/issues/889
-      - name: Patch Synth_Dexed
-        run: |
-          ( cd Synth_Dexed ; patch -p1 < ../src/patches/dx7note.patch )
-
       - name: Build for Raspberry Pi 5 (64-bit)
         run: |
           set -ex
@@ -129,11 +124,6 @@ jobs:
           wget -q https://developer.arm.com/-/media/Files/downloads/gnu-a/10.3-2021.07/binrel/gcc-arm-10.3-2021.07-x86_64-arm-none-eabi.tar.xz
           tar xf gcc-arm-10.3-2021.07-x86_64-arm-none-eabi.tar.xz
 
-      # Patch Synth_Dexed until the fix is merged upstream; see https://github.com/probonopd/MiniDexed/issues/889
-      - name: Patch Synth_Dexed
-        run: |
-          ( cd Synth_Dexed ; patch -p1 < ../src/patches/dx7note.patch )
-
       - name: Build for Raspberry Pi 2 (32-bit)
         run: |
           set -ex