Remove implicit feature flags for optional dependencies

All optional dependencies are enabled as part of dedicated feature
flags.

zcash_client_backend/Cargo.toml

@@ -100,16 +100,16 @@ zcash_address = { workspace = true, features = ["test-dependencies"] }
 time = ">=0.3.22, <0.3.24" # time 0.3.24 has MSRV 1.67
 
 [features]
-lightwalletd-tonic = ["tonic"]
-transparent-inputs = ["hdwallet", "zcash_primitives/transparent-inputs"]
+lightwalletd-tonic = ["dep:tonic"]
+transparent-inputs = ["dep:hdwallet", "zcash_primitives/transparent-inputs"]
 test-dependencies = [
-    "proptest",
+    "dep:proptest",
     "orchard/test-dependencies",
     "zcash_primitives/test-dependencies",
     "incrementalmerkletree/test-dependencies"
 ]
-unstable = ["byteorder"]
-unstable-serialization = ["byteorder"]
+unstable = ["dep:byteorder"]
+unstable-serialization = ["dep:byteorder"]
 unstable-spanning-tree = []
 
 [lib]

zcash_client_sqlite/Cargo.toml

@@ -79,7 +79,7 @@ test-dependencies = [
     "zcash_client_backend/test-dependencies",
     "incrementalmerkletree/test-dependencies",
 ]
-transparent-inputs = ["hdwallet", "zcash_client_backend/transparent-inputs"]
+transparent-inputs = ["dep:hdwallet", "zcash_client_backend/transparent-inputs"]
 unstable = ["zcash_client_backend/unstable"]
 
 [lib]

zcash_history/Cargo.toml

@@ -20,7 +20,7 @@ blake2b_simd.workspace = true
 proptest = { workspace = true, optional = true }
 
 [features]
-test-dependencies = ["proptest"]
+test-dependencies = ["dep:proptest"]
 
 [lib]
 bench = false

zcash_primitives/Cargo.toml

@@ -100,10 +100,10 @@ pprof = { version = "0.11", features = ["criterion", "flamegraph"] } # MSRV 1.56
 [features]
 default = ["multicore"]
 multicore = ["orchard/multicore", "sapling/multicore"]
-transparent-inputs = ["hdwallet", "ripemd", "secp256k1"]
+transparent-inputs = ["dep:hdwallet", "dep:ripemd", "dep:secp256k1"]
 temporary-zcashd = []
 test-dependencies = [
-    "proptest",
+    "dep:proptest",
     "orchard/test-dependencies",
     "sapling/test-dependencies",
 ]

zcash_proofs/Cargo.toml

@@ -45,9 +45,9 @@ byteorder.workspace = true
 
 [features]
 default = ["local-prover", "multicore"]
-bundled-prover = ["wagyu-zcash-parameters"]
+bundled-prover = ["dep:wagyu-zcash-parameters"]
 directories = ["dep:home", "dep:known-folders", "dep:xdg"]
-download-params = ["minreq", "directories"]
+download-params = ["dep:minreq", "directories"]
 local-prover = ["directories"]
 multicore = ["bellman/multicore", "zcash_primitives/multicore"]