docs: remove CreateTimestamp

Author: willfarrell

docs/README.md

@@ -47,7 +47,7 @@ Remember that your API key is for your use only. Please do not share your API ke
 
 - **GET /Observations**
   - Retrieves the observations that meet your query criteria. 
-  - Select By: `Id`,`LocationId`,  `DOI`, `ActivityType`, `ActivityMediaName`, `ActivityStartDate`, `ActivityStartTime`, `ActivityStartTimeZone`, `ActivityEndDate`, `ActivityEndTime`, `ActivityEndTimeZone`, `ActivityDepthHeightMeasure`, `ActivityDepthHeightUnit`, `SampleCollectionEquipmentName`, `CharacteristicName`, `MethodSpeciation`, `ResultSampleFraction`, `ResultValue`, `ResultUnit`, `ResultValueType`, `ResultDetectionCondition`, `ResultDetectionQuantitationLimitUnit`, `ResultDetectionQuantitationLimitMeasure`, `ResultDetectionQuantitationLimitType`, `ResultStatusID`, `ResultComment`, `ResultAnalyticalMethodID`, `ResultAnalyticalMethodContext`, `ResultAnalyticalMethodName`, `AnalysisStartDate`, `AnalysisStartTime`, `AnalysisStartTimeZone`, `LaboratoryName`, `LaboratorySampleID`, `CreateTimestamp`
+  - Select By: `Id`,`LocationId`,  `DOI`, `ActivityType`, `ActivityMediaName`, `ActivityStartDate`, `ActivityStartTime`, `ActivityStartTimeZone`, `ActivityEndDate`, `ActivityEndTime`, `ActivityEndTimeZone`, `ActivityDepthHeightMeasure`, `ActivityDepthHeightUnit`, `SampleCollectionEquipmentName`, `CharacteristicName`, `MethodSpeciation`, `ResultSampleFraction`, `ResultValue`, `ResultUnit`, `ResultValueType`, `ResultDetectionCondition`, `ResultDetectionQuantitationLimitUnit`, `ResultDetectionQuantitationLimitMeasure`, `ResultDetectionQuantitationLimitType`, `ResultStatusID`, `ResultComment`, `ResultAnalyticalMethodID`, `ResultAnalyticalMethodContext`, `ResultAnalyticalMethodName`, `AnalysisStartDate`, `AnalysisStartTime`, `AnalysisStartTimeZone`, `LaboratoryName`, `LaboratorySampleID`
   - Filter By: `DOI`, `LocationId`, `ActivityMediaName`, `ActivityGroupType`, `CharacteristicName`, `MonitoringLocationType`, `ActivityStartYear`, `RegionId`, `LatitudeNormalized`\*, `LongitudeNormalized`\*
 
  \* Normalized coordinates are in `WGS84` projection.