diff --git a/Userland/Libraries/LibCore/IODevice.cpp b/Userland/Libraries/LibCore/IODevice.cpp
index b8e156d01f..f3fef7dccf 100644
--- a/Userland/Libraries/LibCore/IODevice.cpp
+++ b/Userland/Libraries/LibCore/IODevice.cpp
@@ -110,11 +110,6 @@ bool IODevice::can_read_line() const
     }
 }
 
-bool IODevice::can_read() const
-{
-    return !m_buffered_data.is_empty() || can_read_from_fd();
-}
-
 ByteBuffer IODevice::read_all()
 {
     off_t file_size = 0;
@@ -262,16 +257,6 @@ bool IODevice::seek(i64 offset, SeekMode mode, off_t* pos)
     return true;
 }
 
-bool IODevice::truncate(off_t size)
-{
-    int rc = ftruncate(m_fd, size);
-    if (rc < 0) {
-        set_error(errno);
-        return false;
-    }
-    return true;
-}
-
 bool IODevice::write(u8 const* data, int size)
 {
     int rc = ::write(m_fd, data, size);
@@ -289,12 +274,6 @@ void IODevice::set_fd(int fd)
         return;
 
     m_fd = fd;
-    did_update_fd(fd);
-}
-
-bool IODevice::write(StringView v)
-{
-    return write((u8 const*)v.characters_without_null_termination(), v.length());
 }
 
 }
diff --git a/Userland/Libraries/LibCore/IODevice.h b/Userland/Libraries/LibCore/IODevice.h
index d46e0fcd15..2cc825a2e6 100644
--- a/Userland/Libraries/LibCore/IODevice.h
+++ b/Userland/Libraries/LibCore/IODevice.h
@@ -34,14 +34,11 @@ public:
 
     int fd() const { return m_fd; }
     OpenMode mode() const { return m_mode; }
-    bool is_open() const { return m_mode != OpenMode::NotOpen; }
     bool eof() const { return m_eof; }
 
     int error() const { return m_error; }
     char const* error_string() const;
 
-    bool has_error() const { return m_error != 0; }
-
     int read(u8* buffer, int length);
 
     ByteBuffer read(size_t max_size);
@@ -49,15 +46,9 @@ public:
     DeprecatedString read_line(size_t max_size = 16384);
 
     bool write(u8 const*, int size);
-    bool write(StringView);
-
-    bool truncate(off_t);
 
     bool can_read_line() const;
 
-    bool can_read() const;
-    bool can_read_only_from_buffer() const { return !m_buffered_data.is_empty() && !can_read_from_fd(); }
-
     bool seek(i64, SeekMode = SeekMode::SetPosition, off_t* = nullptr);
 
     virtual bool open(OpenMode) = 0;
@@ -71,8 +62,6 @@ protected:
     void set_error(int error) const { m_error = error; }
     void set_eof(bool eof) const { m_eof = eof; }
 
-    virtual void did_update_fd(int) { }
-
 private:
     bool populate_read_buffer(size_t size = 1024) const;
     bool can_read_from_fd() const;