Remove warp examples

Warp is much less popular than Axum today - 30,000 downloads/day on crates.io vs Axum's 200,000/day, as a rough quantiative measure.

As well, warp does not yet have compatiblity with hyper-1.0, though there is some work ongoing (seanmonstar/warp#1088).

When warp adds compatibility with hyper 1.0, these examples can be restored.

examples/Cargo.toml

@@ -149,16 +149,6 @@ path = "src/interceptor/client.rs"
 name = "interceptor-server"
 path = "src/interceptor/server.rs"
 
-[[bin]]
-name = "hyper-warp-client"
-path = "src/hyper_warp/client.rs"
-required-features = ["hyper-warp"]
-
-[[bin]]
-name = "hyper-warp-server"
-path = "src/hyper_warp/server.rs"
-required-features = ["hyper-warp"]
-
 [[bin]]
 name = "health-server"
 path = "src/health/server.rs"
@@ -178,16 +168,6 @@ required-features = ["autoreload"]
 name = "optional-server"
 path = "src/optional/server.rs"
 
-[[bin]]
-name = "hyper-warp-multiplex-client"
-path = "src/hyper_warp_multiplex/client.rs"
-required-features = ["hyper-warp-multiplex"]
-
-[[bin]]
-name = "hyper-warp-multiplex-server"
-path = "src/hyper_warp_multiplex/server.rs"
-required-features = ["hyper-warp-multiplex"]
-
 [[bin]]
 name = "compression-server"
 path = "src/compression/server.rs"
@@ -293,8 +273,6 @@ autoreload = ["tokio-stream/net", "dep:listenfd"]
 health = ["dep:tonic-health"]
 grpc-web = ["dep:tonic-web", "dep:bytes", "dep:http", "dep:hyper", "dep:tracing-subscriber", "dep:tower"]
 tracing = ["dep:tracing", "dep:tracing-subscriber"]
-hyper-warp = ["dep:either", "dep:tower", "dep:hyper", "dep:http", "dep:http-body", "dep:warp"]
-hyper-warp-multiplex = ["hyper-warp"]
 uds = ["tokio-stream/net", "dep:tower", "dep:hyper"]
 streaming = ["tokio-stream", "dep:h2"]
 mock = ["tokio-stream", "dep:tower"]
@@ -310,7 +288,7 @@ types = ["dep:tonic-types"]
 h2c = ["dep:hyper", "dep:tower", "dep:http"]
 cancellation = ["dep:tokio-util"]
 
-full = ["gcp", "routeguide", "reflection", "autoreload", "health", "grpc-web", "tracing", "hyper-warp", "hyper-warp-multiplex", "uds", "streaming", "mock", "tower", "json-codec", "compression", "tls", "tls-rustls", "dynamic-load-balance", "timeout", "tls-client-auth", "types", "cancellation", "h2c"]
+full = ["gcp", "routeguide", "reflection", "autoreload", "health", "grpc-web", "tracing", "uds", "streaming", "mock", "tower", "json-codec", "compression", "tls", "tls-rustls", "dynamic-load-balance", "timeout", "tls-client-auth", "types", "cancellation", "h2c"]
 default = ["full"]
 
 [dependencies]
@@ -323,7 +301,6 @@ tonic-web = { path = "../tonic-web", optional = true }
 tonic-health = { path = "../tonic-health", optional = true }
 tonic-reflection = { path = "../tonic-reflection", optional = true }
 tonic-types = { path = "../tonic-types", optional = true }
-either = { version = "1.9", optional = true }
 async-stream = { version = "0.3", optional = true }
 tokio-stream = { version = "0.1", optional = true }
 tokio-util = { version = "0.7.8", optional = true }
@@ -337,7 +314,6 @@ prost-types = { version = "0.12", optional = true }
 http = { version = "0.2", optional = true }
 http-body = { version = "0.4.2", optional = true }
 hyper = { version = "0.14", optional = true }
-warp = { version = "0.3.4", default-features = false, optional = true }
 listenfd = { version = "1.0", optional = true }
 bytes = { version = "1", optional = true }
 h2 = { version = "0.3", optional = true }