Remove URI type from JSON Schema (#6449)

## Summary

Relative paths (like `./foo/bar`) are also welcome here!

crates/distribution-types/src/index_url.rs

@@ -34,7 +34,6 @@ impl schemars::JsonSchema for IndexUrl {
     fn json_schema(_gen: &mut schemars::gen::SchemaGenerator) -> schemars::schema::Schema {
         schemars::schema::SchemaObject {
             instance_type: Some(schemars::schema::InstanceType::String.into()),
-            format: Some("uri".to_owned()),
             metadata: Some(Box::new(schemars::schema::Metadata {
                 description: Some("The URL of an index to use for fetching packages (e.g., `https://pypi.org/simple`).".to_string()),
               ..schemars::schema::Metadata::default()
@@ -193,7 +192,6 @@ impl schemars::JsonSchema for FlatIndexLocation {
     fn json_schema(_gen: &mut schemars::gen::SchemaGenerator) -> schemars::schema::Schema {
         schemars::schema::SchemaObject {
             instance_type: Some(schemars::schema::InstanceType::String.into()),
-            format: Some("uri".to_owned()),
             metadata: Some(Box::new(schemars::schema::Metadata {
                 description: Some("The path to a directory of distributions, or a URL to an HTML file with a flat listing of distributions.".to_string()),
               ..schemars::schema::Metadata::default()

uv.schema.json

@@ -451,8 +451,7 @@
     },
     "FlatIndexLocation": {
       "description": "The path to a directory of distributions, or a URL to an HTML file with a flat listing of distributions.",
-      "type": "string",
-      "format": "uri"
+      "type": "string"
     },
     "IndexStrategy": {
       "oneOf": [
@@ -481,8 +480,7 @@
     },
     "IndexUrl": {
       "description": "The URL of an index to use for fetching packages (e.g., `https://pypi.org/simple`).",
-      "type": "string",
-      "format": "uri"
+      "type": "string"
     },
     "KeyringProviderType": {
       "description": "Keyring provider type to use for credential lookup.",