chore: remove DeepSource configuration (#8275)

[skip ci]

.deepsource.toml

@@ -1,26 +0,0 @@
-version = 1
-
-exclude_patterns = ["**/mocks_test.go"]
-
-[[analyzers]]
-name = "docker"
-enabled = true
-
-[[analyzers]]
-name = "shell"
-enabled = true
-
-[[analyzers]]
-name = "go"
-enabled = true
-
-  [analyzers.meta]
-  import_root = "github.com/gogs/gogs"
-
-[[transformers]]
-name = "gofumpt"
-enabled = true
-
-[[transformers]]
-name = "gofmt"
-enabled = true