meson: remove cppfs dependency

The dependency on the c++fs library is something very old from the C++14
era and is no longer necessary with a modern compiler.  Remove the
explicit dependency from the meson setup.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ia6aaf743a142f0b460c7f14dfa8bae3dbcd2be83
diff --git a/meson.build b/meson.build
index c32e295..a590265 100644
--- a/meson.build
+++ b/meson.build
@@ -30,7 +30,6 @@
 endif
 
 
-cppfs = meson.get_compiler('cpp').find_library('stdc++fs')
 gmock = dependency('gmock', disabler: true, required: build_tests)
 gtest = dependency('gtest', main: true, disabler: true, required: build_tests)
 phosphor_dbus_interfaces = dependency('phosphor-dbus-interfaces')
@@ -113,7 +112,6 @@
     'pmbus.cpp',
     'utility.cpp',
     dependencies: [
-        cppfs,
         phosphor_dbus_interfaces,
         phosphor_logging,
         sdbusplus,