Remove strict C++20 standard check from meson.build

Google-Bug-Id:482144905,549612859
PiperOrigin-RevId: 967882460
Change-Id: I302d886c6558b75bf981a957dae1ca60c0ea94fb

meson.build

diff --git a/meson.build b/meson.build
index e7f8c5d..8f78352 100644
--- a/meson.build
+++ b/meson.build
@@ -38,12 +38,6 @@
   project_issues_url = project_url + '/issues/new'
   summary('Issues',project_issues_url, section: 'Report Issues')
 
-  # Validate the c++ Standard
-
-  if get_option('cpp_std') != 'c++20'
-      error('This project requires c++20 support')
-  endif
-
   # Get compiler and default build type
 
   cxx = meson.get_compiler('cpp')