Remove duplicate link from Census.gov

The PR #1610 added an duplicate link to the government section

README.md

@@ -537,7 +537,6 @@ API | Description | Auth | HTTPS | CORS |
 | [Open Government, USA](https://www.data.gov/) | United States Government Open Data | No | Yes | Unknown |
 | [Represent by Open North](https://represent.opennorth.ca/) | Find Canadian Government Representatives | No | Yes | Unknown |
 | [UK government API catalogue](https://alphagov.github.io/api-catalogue) | APIs from UK government organisations | No | Yes | Unknown |
-| [US Census Bureau](https://www.census.gov/data/developers/data-sets.html) | U.S. Census data sets and Geolocation | No | Yes | Unknown |
 | [USAspending.gov](https://api.usaspending.gov/) | US federal spending data | No | Yes | Unknown |
 
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