Simplify copyright disclaimer

[reyang]

This is the same as open-telemetry/opentelemetry-dotnet#5140.

[codecov]

Codecov Report

Merging #1473 (f6f5b27) into main (71655ce) will decrease coverage by 0.28%.
Report is 72 commits behind head on main.
The diff coverage is 53.93%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1473      +/-   ##
==========================================
- Coverage   73.91%   73.63%   -0.28%     
==========================================
  Files         267      248      -19     
  Lines        9615     9518      -97     
==========================================
- Hits         7107     7009      -98     
- Misses       2508     2509       +1     

Flag	Coverage Δ
unittests-Exporter.Geneva	57.90% <32.14%> (?)
unittests-Exporter.OneCollector	89.72% <100.00%> (?)
unittests-Extensions	81.89% <100.00%> (?)
unittests-Instrumentation.EventCounters	75.92% <ø> (?)
unittests-Instrumentation.Owin	85.71% <ø> (?)
unittests-Instrumentation.Process	100.00% <ø> (?)
unittests-Instrumentation.Runtime	100.00% <ø> (?)
unittests-Instrumentation.StackExchangeRedis	71.37% <ø> (?)
unittests-Instrumentation.Wcf	78.47% <ø> (?)
unittests-PersistentStorage	58.80% <ø> (?)
unittests-ResourceDetectors.Azure	80.90% <ø> (?)
unittests-ResourceDetectors.ProcessRuntime	76.08% <ø> (?)
unittests-Solution	81.10% <90.32%> (?)

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

Files	Coverage Δ
....Exporter.Geneva/GenevaExporterHelperExtensions.cs	68.18% <ø> (ø)
...Telemetry.Exporter.Geneva/GenevaExporterOptions.cs	90.00% <ø> (ø)
...OpenTelemetry.Exporter.Geneva/GenevaLogExporter.cs	77.50% <ø> (ø)
...lemetry.Exporter.Geneva/GenevaLoggingExtensions.cs	85.71% <ø> (ø)
...enTelemetry.Exporter.Geneva/GenevaTraceExporter.cs	75.00% <ø> (ø)
...xporter.Geneva/Internal/ConnectionStringBuilder.cs	92.94% <100.00%> (ø)
...ry.Exporter.Geneva/Internal/ExporterEventSource.cs	4.76% <ø> (ø)
...eneva/Internal/ReentrantActivityExportProcessor.cs	100.00% <ø> (ø)
...porter.Geneva/Internal/ReentrantExportProcessor.cs	100.00% <ø> (ø)
...ry.Exporter.Geneva/Internal/TableNameSerializer.cs	98.93% <ø> (ø)
... and 109 more

... and 157 files with indirect coverage changes