Simplify copyright disclaimer

[reyang]

Fixes #4900

[codecov]

Codecov Report

Merging #5140 (0117bba) into main (7419d85) will increase coverage by 0.00%.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5140   +/-   ##
=======================================
  Coverage   83.15%   83.16%           
=======================================
  Files         297      297           
  Lines       12369    12369           
=======================================
+ Hits        10286    10287    +1     
+ Misses       2083     2082    -1     

Flag	Coverage Δ
unittests	83.16% <ø> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...ons/Logs/LoggerProviderServiceCollectionBuilder.cs	95.83% <ø> (ø)
...endencyInjectionLoggerProviderBuilderExtensions.cs	100.00% <ø> (ø)
...encyInjectionLoggingServiceCollectionExtensions.cs	100.00% <ø> (ø)
...s/Metrics/MeterProviderServiceCollectionBuilder.cs	96.66% <ø> (ø)
...pendencyInjectionMeterProviderBuilderExtensions.cs	100.00% <ø> (ø)
...encyInjectionMetricsServiceCollectionExtensions.cs	100.00% <ø> (ø)
...endencyInjectionTracerProviderBuilderExtensions.cs	100.00% <ø> (ø)
...encyInjectionTracingServiceCollectionExtensions.cs	100.00% <ø> (ø)
...ns/Trace/TracerProviderServiceCollectionBuilder.cs	97.22% <ø> (ø)
src/OpenTelemetry.Api/ActivityContextExtensions.cs	100.00% <ø> (ø)
... and 186 more

... and 97 files with indirect coverage changes

[cijothomas]

Github PR load testing :)