build issue with rust 1.78

[landryb]

within influxdb 2.7.3 but should be the same on latest:

error: methods `into_type` and `location` are never used                                                                                                                              
    --> flux-core/src/semantic/types.rs:2192:8                                                                                                                                        
     |                                                                                                                                                                                
2189 | pub(crate) trait TypeLike {                                                                                                                                                    
     |                  -------- methods in this trait                                                                                                                                
...                                                                                                                                                                                   
2192 |     fn into_type(self) -> MonoType;                                                 
     |        ^^^^^^^^^                      
2193 |     fn error(&self, error: Error) -> Self::Error;                                   
2194 |     fn location(&self) -> crate::ast::SourceLocation;                               
     |        ^^^^^^^^                       
     |                                       
note: the lint level is defined here         
    --> flux-core/src/lib.rs:1:38            
     |                                       
1    | #![cfg_attr(feature = "strict", deny(warnings, missing_docs))]                      
     |                                      ^^^^^^^^                                       
     = note: `#[deny(dead_code)]` implied by `#[deny(warnings)]`                           

error: could not compile `flux-core` (lib) due to 1 previous error    

seems something changed in what warnings are considered hard errors ?