Update README.md

Author: linwaiwai

README.md

@@ -130,7 +130,6 @@ API安全（旁路分析)
 |-------------------|---------------------------|
 | v1.3.0            | v1.3.0                    |
 | ...               | ...                       |
-| v2.7.3            | v2.7.3                    |
 | v3.0.0            | v3.0.0                    |
 | v3.1.0            | v3.1.0                    |
 | v3.2.0            | v3.2.0                    |