remove multibuild submodule

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "multibuild"]
-	path = multibuild
-	url = https://github.com/matthew-brett/multibuild

config.sh

@@ -1,16 +0,0 @@
-# Define custom utilities
-# Test for OSX with [ -n "$IS_OSX" ]
-
-function pre_build {
-    # Any stuff that you need to do before you start building the wheels
-    # Runs in the root directory of this repository.
-    :
-}
-
-function run_tests {
-    # check we have the expected version and architecture for Python
-    python -c "import sys; print(sys.version)"
-    python -c "import struct; print(struct.calcsize('P') * 8)"
-    # run the test suite
-    pytest -v ../tests
-}

multibuild

@@ -1 +0,0 @@
-Subproject commit 938d95797015a1b742cf5e71b8b2f525a0d9ed58