fix: remove unused imports and non-const format builder

src/main.rs

@@ -39,7 +39,6 @@ pub mod db;
 
 use compression::CompressionType;
 
-use is_terminal::IsTerminal;
 
 extern crate term;
 

src/modes/common.rs

@@ -45,7 +45,7 @@ pub fn size_column(size: u64, human_readable: bool, column_width: usize) -> Stri
     string_column(format_size(size, human_readable), column_width)
 }
 
-pub const FORMAT_BOX_CHARS_NO_BORDER_LINE_SEPARATOR: prettytable::format::TableFormat =
+pub fn get_format_box_chars_no_border_line_separator() -> TableFormat {
     prettytable::format::FormatBuilder::new()
         .column_separator('│')
         .borders('│')
@@ -62,4 +62,5 @@ pub const FORMAT_BOX_CHARS_NO_BORDER_LINE_SEPARATOR: prettytable::format::TableF
             prettytable::format::LineSeparator::new('─', '┴', '└', '┘')
         )
         .padding(1, 1)
-        .build();
+        .build()
+}

src/modes/info.rs

@@ -4,7 +4,7 @@ use clap::Command;
 use std::path::PathBuf;
 use std::str::FromStr;
 
-use crate::modes::common::{format_size, string_column};
+use crate::modes::common::format_size;
 use is_terminal::IsTerminal;
 use crate::compression::get_engine;
 use crate::compression::CompressionType;