Merge pull request #224 from fiddlerwoaroof/wave/tt22-no-legacy-json

.improv is the only native format: remove the legacy JSON document loader (improvise-tt22)

harness/opfs-contract/Cargo.lock

@@ -196,7 +196,6 @@ dependencies = [
  "anyhow",
  "pest",
  "pest_derive",
- "serde",
 ]
 
 [[package]]
@@ -228,8 +227,6 @@ checksum = "cc4e190f5d26ca7051642629da2c52fc03bde85a03197c99408dcd291734c855"
 dependencies = [
  "equivalent",
  "hashbrown",
- "serde",
- "serde_core",
 ]
 
 [[package]]