Remove hash2curve and oprf (#1929)

This is the companion PR to
RustCrypto/elliptic-curves#1286.

Resolves #1928.

Author: daxpedda

.github/workflows/elliptic-curve.yml

@@ -43,9 +43,7 @@ jobs:
       - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features dev
       - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features digest
       - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features ecdh
-      - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features hash2curve
       - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features jwk
-      - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features oprf
       - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features pem
       - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features pkcs8
       - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features sec1
@@ -54,7 +52,7 @@ jobs:
       - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features alloc,arithmetic,pkcs8
       - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features alloc,serde
       - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features arithmetic,serde
-      - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features alloc,digest,ecdh,hash2curve,jwk,oprf,pem,pkcs8,sec1,serde
+      - run: cargo build --target ${{ matrix.target }} --release --no-default-features --features alloc,digest,ecdh,jwk,pem,pkcs8,sec1,serde
 
   minimal-versions:
     # Temporarily disabled until elliptic-curve 0.13.0-pre.0 is published

elliptic-curve/Cargo.toml

@@ -64,12 +64,10 @@ bits = ["arithmetic", "ff/bits"]
 dev = ["arithmetic", "dep:hex-literal", "pem", "pkcs8"]
 ecdh = ["arithmetic", "digest", "dep:hkdf"]
 group = ["dep:group", "ff"]
-hash2curve = ["arithmetic", "digest"]
 jwk = ["dep:base64ct", "dep:serde_json", "alloc", "serde", "zeroize/alloc"]
-oprf = ["digest", "hash2curve"]
 pkcs8 = ["dep:pkcs8", "sec1"]
 pem = ["dep:pem-rfc7468", "alloc", "arithmetic", "pkcs8", "sec1/pem"]
 serde = ["dep:serdect", "alloc", "pkcs8", "sec1/serde"]
 
 [package.metadata.docs.rs]
-features = ["bits", "ecdh", "hash2curve", "jwk", "oprf", "pem", "std"]
+features = ["bits", "ecdh", "jwk", "pem", "std"]