Revert "Explicitly ask for pthreads"

This reverts commit 8e87228c.

Turns out this doesn't work

meson.build

@@ -10,7 +10,7 @@ libm = cc.find_library('m')
 
 glib_dep = dependency('glib-2.0', version: '>= 2.16', required: false)
 openmp_dep = dependency('openmp', required: false)
-pthreads_dep = dependency('pthreads', required: false)
+thread_dep = dependency('threads', required: false)
 
 conf_data = configuration_data()
 

src/meson.build

@@ -34,6 +34,6 @@ if openmp_dep.found()
     subdir('openmp')
 endif
 
-if pthreads_dep.found()
-    subdir('pthreads')
+if thread_dep.found()
+    subdir('pthread')
 endif

src/pthreads/meson.build → src/pthread/meson.build

@@ -3,4 +3,4 @@
 # SPDX-License-Identifier: CC0-1.0
 
 executable('thread-incr', 'thread-incr.c',
-           dependencies: [pthreads_dep, utils_dep])
+           dependencies: [thread_dep, utils_dep])