Removed the compiler-flags property

This updates the documentation in accordance with lf-lang/lingua-franca#2233

Author: cmnrd

docs/reference/target-declaration.mdx

@@ -30,7 +30,6 @@ A target specification may have optional parameters, the names and values of whi
 - [**cargo-features**](#cargo-features): (Rust only) List of string names of features to include.
 - [**cmake-include**](#cmake): List of paths to cmake files to guide compilation.
 - [**compiler**](#compiler): A string giving the name of the target language compiler to use.
-- [**compiler-flags**](#compiler-flags): An arrays of strings giving options to be passed to the target compiler.
 - [**docker**](#docker): A boolean to generate a Dockerfile.
 - [**external-runtime-path**](#external-runtime-path): Specify a pre-compiled external runtime library located to link to instead of the default.
 - [**export-dependency-graph**](#export-dependency-graph): To export the reaction dependency graph as a dot graph (for debugging).
@@ -58,7 +57,6 @@ c={
     build-type: <Release, Debug, RelWithDebInfo, or MinSizeRel>,
     cmake-include: <string or list of strings>,
     compiler: <string>,
-    compiler-flags: <string or list of strings>,
     docker: <true or false>,
     fast: <true or false>,
     files: <string or list of strings>,
@@ -128,7 +126,6 @@ For example:
 target C {
     cmake: false,
     compiler: "cc",
-    flags: "-O3",
     fast: true,
     logging: log,
     timeout: 1 secs,
@@ -349,27 +346,6 @@ to point to your preferred compiler. Possible values are, for instance, `gcc`,
 </ShowIf>
 </ShowIfs>
 
-## compiler-flags
-
-<ShowIfs>
-<ShowIf cpp py ts rs>
-This target does not support the `compiler-flags` parameter.
-</ShowIf>
-<ShowIf c>
-This parameter is a list of strings giving additional arguments to pass to the target language compiler. For example:
-
-```lf-c
-target C {
-    compiler-flags: ["-g", "-I/usr/local/include", "-L/usr/local/lib", "-lpaho-mqtt3c"],
-};
-```
-
-The `compiler-flags` option specifies to include debug information in the compiled code (`-g`); a directory to search for include files (`-I/usr/local/include`); a directory to search for library files (`-L/usr/local/lib`); a library to link with (`-lpaho-mqtt3c`, which will link with file `libpaho-mqtt3c.so`).
-
-**Note**: Using the `compiler-flags` parameter is strongly discouraged, although supported. Flags are compiler-specific, and thus interfere with CMake's ability to find the most suitable compiler for each platform. In a similar fashion, we recommend against the use of the `compiler` standard parameter for the same reason. A better solution is to provide a `cmake-include` file.
-</ShowIf>
-</ShowIfs>
-
 ## docker
 
 <ShowIfs>