Remove old cargo-lock machinery for dep-trees

.gitignore

@@ -44,6 +44,7 @@ compile_commands.json
 /src/main/StellarCoreVersion.cpp
 /src/main/XDRFilesSha256.cpp
 /src/rust/soroban/tmp
+/src/rust/src/dep-trees/*-actual.txt
 
 /src/testdata/*
 # Make an exception for ledger-close-meta files, which should be created and committed on every protocol bump.

src/rust/Cargo.toml

@@ -19,8 +19,6 @@ rustc-simple-version = "=0.1.0"
 # will complain if it does not match)
 rand = "=0.8.5"
 
-petgraph = "=0.6.4"
-toml = "=0.7.8"
 itertools = "=0.11.0"
 
 # Stellar-core supports multiple versions of the Soroban host linked in
@@ -81,12 +79,6 @@ git = "https://github.com/stellar/rs-soroban-env"
 rev = "5ed156b7fb5dd3e46635aa0f818d5db33dfd6b6a"
 #path = "../../../rs-soroban-env/soroban-synth-wasm"
 
-[dependencies.cargo-lock]
-version = "=9.0.0"
-git = "https://github.com/rustsec/rustsec"
-rev = "a5c69fc6e4b6068b43d7143f3a2f68c3f3de37d8"
-features = ["dependency-tree"]
-
 [features]
 
 tracy = ["dep:tracy-client"]

src/rust/src/dep-trees/README.md

@@ -1,8 +1,6 @@
-This directory contains explicit dependency trees for the different soroban
-hosts linked into stellar-core. To add a new one, install cargo-lock and run
-something like:
-
-  $ cargo lock tree --exact [email protected] > p22.txt
-  $ git add p22.txt
-
-With whatever version you want to support in place of "22".
+This directory contains expected dependency trees for the different soroban
+hosts linked into stellar-core. During a build the makefile will extract
+the actual dependency tree of the configured soroban-env-host from their
+submodule lockfiles and compare them. If they differ you need to decide
+how to fix it: either update the expectation, or roll back the change
+in the submodule.